@book{WaS401,
  address = {Munich},
  author = {Wagner, Ralf},
  booktitle = {25th Annual Conference of the German Classification Society},
  interhash = {e1fe7c52d80e640e2ecc79ee0e82330c},
  intrahash = {836683748bc5a7f98b06356e72ce5c90},
  title = {Patterns of Competition},
  year = 2001
}

@book{WaS101,
  author = {Wagner, Ralf},
  booktitle = {Invited Presentation at the University of Management and Information Technology in Rzeszow},
  interhash = {e1fe7c52d80e640e2ecc79ee0e82330c},
  intrahash = {b3d0cd5997025df0b9fb2dcc1d3f1267},
  title = {Patterns of Competition},
  year = 2001
}

@book{WaS106,
  address = {Ljubljana},
  author = {Wagner, Ralf},
  booktitle = {10th Biannual Conference of the International Federation of Classification Societies},
  interhash = {14b717bcb4097a14b35f927bf8649ac7},
  intrahash = {e47d23a8448472d793710b8e86b103bf},
  title = {Patterns of Associations in Finite Sets of Items},
  year = 2006
}